Identification apparatus and identification method

ABSTRACT

An identification apparatus including an image capturing device, at least one light emitting device disposed beside the image capturing device and a zoom lens disposed above the image capturing device is provided. The light emitting device is adapted to emit a visible light and an invisible light. A focal length of the zoom lens is adapted to be switched to a first focal length or a second focal length. The light emitting device emits the visible light and the focal length of the zoom lens is switched to the first focal length so that the image capturing device captures a fingerprint image of a finger. The light emitting device emits the invisible light and the focal length of the zoom lens is switched to the second focal length so that the image capturing device captures a vein image of the finger. Moreover, an identification method is also provided.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefits of U.S. provisional application Ser. No. 62/363,329, filed on Jul. 17, 2016, and Taiwan application serial no. 105124359, filed on Aug. 1, 2016. The entirety of each of the above-mentioned patent applications is hereby incorporated by reference herein and made a part of this specification.

BACKGROUND OF THE INVENTION Field of the Invention

The invention relates to an identification apparatus and an identification method.

Description of Related Art

Fingerprint identification apparatuses can be divided into optical, capacitive, ultrasonic and thermal sensing type fingerprint identification apparatuses. Taking the optical fingerprint identification apparatus as an example, the conventional optical fingerprint identification apparatus includes an optical assembly and an image capturing device. The optical assembly is used for transmitting light beams. The optical assembly is, for example, a lens, a prism, etc. The image capturing device is used for capturing an image of a fingerprint. The image capturing device is, for example, a charge-coupled device (CCD), a complementary metal oxide semiconductor (CMOS), etc.

A principle of the optical fingerprint identification is as follows. The fingerprint of a finger is composed of a plurality of irregular peaks and troughs. When the finger presses the fingerprint identification apparatus, the peaks contact the fingerprint identification apparatus, and the troughs do not contact the fingerprint identification apparatus. The peaks may directly reflect the light beams to the image capturing device to form bright zones. Meanwhile, the light beams irradiating the troughs are repeatedly reflected in the troughs, and are then transmitted to the image capturing device to form dark zones. In this way, the light beams corresponding to the peaks and the troughs of the fingerprint form bright and dark interleaved stripe patterns on a light reception surface of the image capturing device, such that the image capturing device obtains a fingerprint image. By using an algorithm to analyse information corresponding to the fingerprint image, user' s identification can be identified.

However, the conventional fingerprint identification apparatus uses a fixed-focus lens to capture the fingerprint image. Limited by an optical design of the lens, the fingerprint identification apparatus can only detect a single fingerprint image. If the user' s identification is identified according to the fingerprint image, it is liable to be deceived by a fake finger, which results in decrease of usage security of the fingerprint identification apparatus.

SUMMARY OF THE INVENTION

The invention is directed to an identification apparatus and an identification method, which have high usage security.

The invention provides an identification apparatus including an image capturing device, at least one light-emitting device disposed beside the image capturing device and a zoom lens disposed above the image capturing device. The at least one light-emitting device is adapted to emit a visible light and an invisible light. A focal length of the zoom lens is adapted to be switched to a first focal length or a second focal length. The at least one light-emitting device emits the visible light and the focal length of the zoom lens is switched to the first focal length so that the image capturing device captures a fingerprint image of a finger. The at least one light-emitting device emits the invisible light and the focal length of the zoom lens is switched to the second focal length so that the image capturing device captures a vein image of the finger.

The invention provides an identification method including: providing the aforementioned identification apparatus; making the at least one light-emitting device to emit the visible light to irradiate a finger, and switching the focal length of the zoom lens to the first focal length so that the image capturing device captures a fingerprint image of the finger; and making the at least one light-emitting device to emit the invisible light to irradiate the finger, and switching the focal length of the zoom lens to the second focal length so that the image capturing device captures a vein image of the finger; verifying the fingerprint image, the vein image or a combination thereof, and determining true or false of the finger according to a verifying result of the fingerprint image, a verifying result of the vein image or a combination thereof.

In an exemplary embodiment of the invention, the identification apparatus further includes a processing unit. The processing unit is electrically connected to the image capturing device. The processing unit verifies the fingerprint image, the vein image or a combination thereof, and determines true or false of the finger according to a verifying result of the fingerprint image, a verifying result of the vein image or a combination thereof.

In an exemplary embodiment of the invention, the at least one light-emitting device includes a first light-emitting device adapted to emit the visible light and a second light-emitting device adapted to emit the invisible light.

In an exemplary embodiment of the invention, the identification apparatus further includes a circuit board. The image capturing device is disposed on the circuit board and is electrically connected to the circuit board.

In an exemplary embodiment of the invention, the identification apparatus further includes a main body. The image capturing device, the at least one light-emitting device and the zoom lens are disposed in the main body.

In an exemplary embodiment of the invention, the identification apparatus further includes a transparent pressing plate. The transparent pressing plate is disposed on the main body, and shields the light capturing device, the at least one light-emitting device and the zoom lens.

In an exemplary embodiment of the invention, if the finger is determined to be true, the identification method further includes: determining an identification of a user having the finger according to the fingerprint image, the vein image or the combination thereof.

In an exemplary embodiment of the invention, the finger is determined to be true when the fingerprint image is verified to be true and the vein image is verified to be true.

In an exemplary embodiment of the invention, after the fingerprint image is captured and verified, the vein image is captured and verified.

In an exemplary embodiment of the invention, true or false of the finger is determined according to the verifying result of the vein image other than according to the verifying result of the fingerprint image.

In an exemplary embodiment of the invention, after the vein image is captured and verified, the fingerprint image is captured and verified.

In an exemplary embodiment of the invention, true or false of the finger is determined according to the verifying result of the fingerprint image other than according to the verifying result of the vein image.

According to the above description, in the identification apparatus of the invention, the at least one light-emitting device capable of emitting the visible light and the invisible light and the zoom lens are adopted to capture the fingerprint image of the finger and the vein image of the finger. Correctness for determining the true of false of the finger is improved according to the verifying result of the fingerprint image, the verifying result of the vein image or the combination thereof, so as to improve usage security of the identification apparatus and decrease a chance of being deceived by a false finger.

In order to make the aforementioned and other features and advantages of the invention comprehensible, several exemplary embodiments accompanied with figures are described in detail below.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic diagram of an identification apparatus according to an embodiment of the invention.

FIG. 2 is a flowchart illustrating an identification method according to an embodiment of the invention.

FIG. 3 is a flowchart illustrating an identification method according to another embodiment of the invention.

FIG. 4 is a flowchart illustrating an identification method according to still another embodiment of the invention.

FIG. 5 is a flowchart illustrating an identification method according to an embodiment of the invention.

FIG. 6 is a flowchart illustrating an identification method according to another embodiment of the invention.

DESCRIPTION OF EMBODIMENTS

FIG. 1 is a schematic diagram of an identification apparatus according to an embodiment of the invention. Referring to FIG. 1, the identification apparatus 100 includes an image capturing device 110, at least one light-emitting device 121, 122 and a zoom lens 130. In the present embodiment, the identification apparatus 100 may further include a circuit board 140. The image capturing device 110 is disposed on the circuit board 140 and is electrically connected to the circuit board 140. The image capturing device 110 is, for example, a complementary metal oxide semiconductor (CMOS) or a charge-coupled device (CCD), though the invention is not limited thereto, and in other embodiments, the image capturing device 110 can be other suitable devices.

The at least one light-emitting device 121, 122 is disposed beside the image capturing device 110 and is adapted to emit a visible light L1 and an invisible light L2. For example, the at least one light-emitting device 121, 122 may include a first light-emitting device 121 and a second light-emitting device 122. The first light-emitting device 121 can emit the visible light L1. The visible light L1 serves as a light source for irradiating a fingerprint F1 of a finger F. The second light-emitting device 122 can emit the invisible light L2. The invisible light L2 serves as a light source for irradiating a vein F2 of the finger F. A wavelength range of the visible light L1 includes 350 nm-760 nm, and a wavelength range of the invisible light L2 includes 760 nm-1100 nm, though the invention is not limited thereto. In the present embodiment, the first light-emitting device 121 and the second light-emitting device 122 can be disposed on the circuit board 140 and are electrically connected to the circuit board 140. The circuit board 140 may control the at least one light-emitting device 121, 122 to emit the visible light L1 and the invisible light L2 at proper timings, though the invention is not limited thereto.

The zoom lens 130 is disposed above the image capturing device 110. A focal length of the zoom lens 130 is adapted to be switched to a first focal length D1 or a second focal length D2, where the first focal length D1 is different to the second focal length D2. In the present embodiment, the zoom lens 130 can be electrically connected to the circuit board 140. The circuit board 140 may control the zoom lens 130 to switch the first focal length D1 and the second focal length D2 at proper timings, though the invention is not limited thereto.

In the present embodiment, the identification apparatus 100 further includes a main body 150. The circuit board 140, the image capturing device 110, the at least one light-emitting device 121, 122 and the zoom lens 130 can be disposed in the main body 150. The identification apparatus 100 further includes a transparent pressing plate 160. The transparent pressing plate 160 is disposed on the main body 150, and shields the circuit board 140, the light capturing device 110, the at least one light-emitting device 121, 122 and the zoom lens 130. The main body 150 and the transparent pressing plate 160 may encircle an accommodating space R. The circuit board 140, the light capturing device 110, the at least one light-emitting device 121, 122 and the zoom lens 130 can be located in the accommodating space R.

The identification apparatus 100 of FIG. 1 is used for identifying biologic characteristics (for example, fingerprint, vein, etc.) to decrease a chance of being deceived by a fake finger. FIG. 1, FIG. 2, FIG. 3, FIG. 4, FIG. 5 and FIG. 6 are provided below for further description.

FIG. 2 is a flowchart illustrating an identification method according to an embodiment of the invention. Referring to FIG. 1 and FIG. 2, in the embodiment of FIG. 2, a step S110 is first executed, by which the first light-emitting device 121 is controlled to emit the visible light L1 to irradiate the finger F, and the focal length of the zoom lens 130 is switched to the first focal length D1. Now, the fingerprint F1 of the finger F is substantially located on a first focal plan P1 of the zoom lens 130, and the visible light L1 reflected by the fingerprint F1 may penetrate through the zoom lens 130 to image on a light reception surface of the image capturing device 110, such that the image capturing device 110 captures an image of the fingerprint F1 of the finger F. In the present embodiment, the identification apparatus 100 may further include a processing unit 170. The processing unit 170 is electrically connected to the image capturing device 110. The processing unit 170 is, for example, a chip on the circuit board 140, though the invention is not limited thereto. Then, in step S120, it is verified whether the image of the fingerprint F1 is true. In detail, the processing unit 170 compares the image of the fingerprint F1 captured by the image capturing device 110 with a pre-stored fingerprint image. If the image of the fingerprint F1 captured by the image capturing device 110 is not in consistence with the pre-stored fingerprint image, the fingerprint F1 is verified to be false, and the finger F is determined to be false.

If the image of the fingerprint F1 captured by the image capturing device 110 is in consistence with the pre-stored fingerprint image, the fingerprint F1 is verified to be true. Then, step S130, the second light-emitting device 122 is controlled to emit the invisible light L2 to irradiate the finger F, and the focal length of the zoom lens 130 is switched to the second focal length D2. Now, the vein F2 of the finger F is substantially located on a second focal plan P2 of the zoom lens 130, and the invisible light L2 reflected by the vein F2 may penetrate through the zoom lens 130 to image on the light reception surface of the image capturing device 110, such that the image capturing device 110 captures an image of the vein F2 of the finger F. Then, in step S140, it is verified whether the image of the vein F2 is true. In detail, the processing unit 170 compares the image of the vein F2 captured by the image capturing device 110 with a pre-stored vein image. If the image of the vein F2 captured by the image capturing device 110 is not in consistence with the pre-stored vein image, the vein F2 is verified to be false, and the finger F is determined to be false. In this way, even if the identification apparatus 100 is deceived by the fake finger in the step S120, and the fingerprint F1 of the finger F is misjudged to be true, the finger F can still be identified to be false. In other words, by using the identification apparatus of FIG. 1 and the identification method of FIG. 2, it is not easy to be deceived by the fake finger, so as to improve usage security of the identification apparatus 100. In the step S140, if the image of the vein F2 is true (i.e. the image of the vein F2 captured by the image capturing device 110 is in consistence with the pre-stored vein image), in step S150, an identity of the user (i.e. owner of the finger F) is identified according to the image of the fingerprint F1, the image of the vein F2 or a combination thereof.

FIG. 3 is a flowchart illustrating an identification method according to another embodiment of the invention. Referring to FIG. 1 and FIG. 3, in the embodiment of FIG. 3, a step S210 is first executed, by which the second light-emitting device 122 is controlled to emit the invisible light L2 to irradiate the finger F, and the focal length of the zoom lens 130 is switched to the second focal length D2. Now, the vein F2 of the finger F is substantially located on the second focal plan P2 of the zoom lens 130, and the invisible light L2 reflected by the vein F2 may penetrate through the zoom lens 130 to image on the light reception surface of the image capturing device 110, such that the image capturing device 110 captures an image of the vein F2 of the finger F. Then, in step S220, it is verified whether the image of the vein F2 is true. In detail, the processing unit 170 compares the image of the vein F2 captured by the image capturing device 110 with a pre-stored vein image. If the image of the vein F2 captured by the image capturing device 110 is not in consistence with the pre-stored vein image, the vein F2 is verified to be false, and the finger F is determined to be false. If the image of the vein F2 captured by the image capturing device 110 is in consistence with the pre-stored vein image, the vein F2 is verified to be true. Then, in step S230, the first light-emitting device 121 is controlled to emit the visible light L1 to irradiate the finger F, and the focal length of the zoom lens 130 is switched to the first focal length D1. Now, the fingerprint F1 of the finger F is substantially located on the first focal plan P1 of the zoom lens 130, and the visible light L1 reflected by the fingerprint F1 may penetrate through the zoom lens 130 to image on the light reception surface of the image capturing device 110, such that the image capturing device 110 captures an image of the fingerprint F1 of the finger F. Then, in step S240, it is verified whether the image of the fingerprint F1 is true. In detail, the processing unit 170 compares the image of the fingerprint F1 captured by the image capturing device 110 with a pre-stored fingerprint image. If the image of the fingerprint F1 captured by the image capturing device 110 is not in consistence with the pre-stored fingerprint image, the fingerprint F1 is verified to be false, and the finger F is determined to be false. In the step S240, if the image of the fingerprint F1 captured by the image capturing device 110 is in consistence with the pre-stored fingerprint image, the fingerprint F1 is verified to be true, and the finger F is determined to be true. Then, in step S250, the identity of the user is identified according to the image of the fingerprint F1, the image of the vein F2 or a combination thereof. Similarly, the identification method of FIG. 3 also has high security and is not easy to be deceived by the fake finger.

FIG. 4 is a flowchart illustrating an identification method according to still another embodiment of the invention. Referring to FIG. 1 and FIG. 4, in the embodiment of FIG. 4, a step S310 is first executed, by which the first light-emitting device 121 is controlled to emit the visible light L1 to irradiate the finger F, and the focal length of the zoom lens 130 is switched to the first focal length D1. Now, the fingerprint F1 of the finger F is substantially located on the first focal plan P1 of the zoom lens 130, and the visible light L1 reflected by the fingerprint F1 may penetrate through the zoom lens 130 to image on the light reception surface of the image capturing device 110, such that the image capturing device 110 captures an image of the fingerprint F1 of the finger F. Then, in step S320, it is verified whether the image of the fingerprint F1 is true. In detail, the processing unit 170 compares the image of the fingerprint F1 captured by the image capturing device 110 with the pre-stored fingerprint image. If the image of the fingerprint F1 captured by the image capturing device 110 is in consistence with the pre-stored fingerprint image, the fingerprint F1 is verified to be true, and the finger F is determined to be true. Then, in step S330, the identity of the user is identified according to the image of the fingerprint F1.

In step S320, if the image of the fingerprint F1 is verified to be false, i.e. the image of the fingerprint F1 captured by the image capturing device 110 is not in consistence with the pre-stored fingerprint image, in step S340, the second light-emitting device 122 is controlled to emit the invisible light L2 to irradiate the finger F, and the focal length of the zoom lens 130 is switched to the second focal length D2. Now, the vein F2 of the finger F is substantially located on the second focal plan P2 of the zoom lens 130, and the invisible light L2 reflected by the vein F2 may penetrate through the zoom lens 130 to image on the light reception surface of the image capturing device 110, such that the image capturing device 110 captures an image of the vein F2 of the finger F. Then, in step S350, it is verified whether the image of the vein F2 is true. In detail, the processing unit 170 compares the image of the vein F2 captured by the image capturing device 110 with the pre-stored vein image. If the image of the vein F2 captured by the image capturing device 110 is in consistence with the pre-stored vein image, the vein F2 is verified to be true, and the finger F is determined to be true. Then, in step S330, the identity of the user is identified according to the vein F2. In step S350, if the image of the vein F2 captured by the image capturing device 110 is not in consistence with the pre-stored vein image, i.e. the vein F2 is verified to be false, the finger F is determined to be false. It should be noted that the identification method of FIG. 4 is particularly adapted to users without a fingerprint or with shallow fingerprint troughs. In detail, in the step S320, if the image of the fingerprint F1 is misjudged to be false due to that the user has no fingerprint or has shallow fingerprint troughs, by switching to the vein identification method (i.e. to perform the steps S340, S350), it can still correctly determine whether the finger F is true, so as to identify the identity of the user.

FIG. 5 is a flowchart illustrating an identification method according to an embodiment of the invention. Referring to FIG. 1 and FIG. 5, in the embodiment of FIG. 5, a step S410 is first executed, by which the second light-emitting device 122 is controlled to emit the invisible light L2 to irradiate the finger F, and the focal length of the zoom lens 130 is switched to the second focal length D2. Now, the vein F2 of the finger F is substantially located on the second focal plan P2 of the zoom lens 130, and the invisible light L2 reflected by the vein F2 may penetrate through the zoom lens 130 to image on the light reception surface of the image capturing device 110, such that the image capturing device 110 captures an image of the vein F2 of the finger F. Then, in step S420, it is verified whether the image of the vein F2 is true. In detail, the processing unit 170 compares the image of the vein F2 captured by the image capturing device 110 with the pre-stored vein image. If the image of the vein F2 captured by the image capturing device 110 is in consistence with the pre-stored vein image, the vein F2 is verified to be true, and the finger F is determined to be true. Then, in step S430, the identity of the user is identified according to the image of the vein F2.

In step S420, if the vein F2 is verified to be false, i.e. the image of the vein F2 captured by the image capturing device 110 is not in consistence with the pre-stored vein image, in step S440, the first light-emitting device 121 is controlled to emit the visible light L1 to irradiate the finger F, and the focal length of the zoom lens 130 is switched to the first focal length D1. Now, the fingerprint F1 of the finger F is substantially located on the first focal plan P1 of the zoom lens 130, and the visible light L1 reflected by the fingerprint F1 may penetrate through the zoom lens 130 to image on the light reception surface of the image capturing device 110, such that the image capturing device 110 captures an image of the fingerprint F1 of the finger F. Then, in step S450, it is verified whether the image of the fingerprint F1 is true. In detail, the processing unit 170 compares the image of the fingerprint F1 captured by the image capturing device 110 with the pre-stored fingerprint image. If the image of the fingerprint F1 captured by the image capturing device 110 is in consistence with the pre-stored fingerprint image, the fingerprint F1 is verified to be true, and the finger F is determined to be true. Then, in step S330, the identity of the user (i.e. the owner of the finger F) is identified according to the image of the fingerprint F1.

It should be noted that the identification method of FIG. 5 is particularly adapted to the user with a special vein that is not easy to be identified. In detail, in the step S420, if the image of the vein F2 is misjudged to be false due to that the user has the special vein F2, by switching to the fingerprint identification method (i.e. to perform the steps S440, S450), it can still correctly determine whether the finger F is true, so as to identify the identity of the user.

FIG. 6 is a flowchart illustrating an identification method according to another embodiment of the invention. Referring to FIG. 1 and FIG. 6, in the embodiment of FIG. 6, in order to quickly identify the identity of the user, the identification apparatus 100 can be switched to a fingerprint identification mode or a vein identification mode. In detail, when the identification apparatus 100 is switched to the fingerprint identification mode, a step S510 is executed, by which the first light-emitting device 121 is controlled to emit the visible light L1 to irradiate the finger F, and the focal length of the zoom lens 130 is switched to the first focal length D1. Now, the fingerprint F1 of the finger F is substantially located on the first focal plan P1 of the zoom lens 130, and the visible light L1 reflected by the fingerprint F1 may penetrate through the zoom lens 130 to image on a light reception surface of the image capturing device 110, such that the image capturing device 110 captures an image of the fingerprint F1 of the finger F. Then, in step S520, it is verified whether the image of the fingerprint F1 is true. In detail, the processing unit 170 compares the image of the fingerprint F1 captured by the image capturing device 110 with the pre-stored fingerprint image. If the image of the fingerprint F1 captured by the image capturing device 110 is in consistence with the pre-stored fingerprint image, the finger F is determined to be true. Then, in step S530, the identity of the user is identified according to the image of the fingerprint F1. When the identification apparatus 100 is switched to the vein identification mode, a step S540 is executed, by which the second light-emitting device 122 is controlled to emit the invisible light L2 to irradiate the finger F, and the focal length of the zoom lens 130 is switched to the second focal length D2. Now, the vein F2 of the finger F is substantially located on the second focal plan P2 of the zoom lens 130, and the invisible light L2 reflected by the vein F2 may penetrate through the zoom lens 130 to image on the light reception surface of the image capturing device 110, such that the image capturing device 110 captures an image of the vein F2 of the finger F. Then, in step S550, it is verified whether the image of the vein F2 is true. In detail, the processing unit 170 compares the image of the vein F2 captured by the image capturing device 110 with the pre-stored vein image. If the image of the vein F2 captured by the image capturing device 110 is in consistence with the pre-stored vein image, the vein F2 is verified to be true, and the finger F is determined to be true. Then, in step S530, the identity of the user is identified according to the image of the vein F2. If the image of the vein F2 captured by the image capturing device 110 is not in consistence with the pre-stored vein image, i.e. the vein F2 is verified to be false, the finger F is determined to be false.

In summary, in the identification apparatus of the invention, the at least one light-emitting device capable of emitting the visible light and the invisible light and the zoom lens are adopted to capture the fingerprint image of the finger and the vein image of the finger. Correctness for determining the true of false of the finger is improved according to the verifying result of the fingerprint image, the verifying result of the vein image or the combination thereof, so as to improve usage security of the identification apparatus and decrease a chance of being deceived by a false finger.

It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the invention cover modifications and variations of this invention provided they fall within the scope of the following claims and their equivalents. 

What is claimed is:
 1. An identification apparatus, comprising: an image capturing device; at least one light-emitting device disposed beside the image capturing device, and adapted to emit a visible light and an invisible light; and a zoom lens, disposed above the image capturing device, wherein a focal length of the zoom lens is adapted to be switched to a first focal length or a second focal length, the at least one light-emitting device emits the visible light and the focal length of the zoom lens is switched to the first focal length so that the image capturing device captures a fingerprint image of a finger, the at least one light-emitting device emits the invisible light and the focal length of the zoom lens is switched to the second focal length so that the image capturing device captures a vein image of the finger.
 2. The identification apparatus as claimed in claim 1, further comprising: a processing unit, electrically connected to the image capturing device, and verifying the fingerprint image, the vein image or a combination thereof, and determining true or false of the finger according to a verifying result of the fingerprint image, a verifying result of the vein image or a combination thereof.
 3. The identification apparatus as claimed in claim 1, wherein the at least one light-emitting device comprises: a first light-emitting device, adapted to emit the visible light; and a second light-emitting device, adapted to emit the invisible light.
 4. The identification apparatus as claimed in claim 1, further comprising: a circuit board, the image capturing device being disposed on the circuit board and electrically connected to the circuit board.
 5. The identification apparatus as claimed in claim 1, further comprising: a main body, the image capturing device, the at least one light-emitting device and the zoom lens being disposed in the main body.
 6. The identification apparatus as claimed in claim 5, further comprising: a transparent pressing plate, disposed on the main body and shielding the light capturing device, the at least one light-emitting device and the zoom lens.
 7. An identification method, comprising: providing an identification apparatus, wherein the identification apparatus comprises an image capturing device, at least one light-emitting device disposed beside the image capturing device and a zoom lens disposed above the image capturing device, wherein the at least one light-emitting device is adapted to emit a visible light and an invisible light, and a focal length of the zoom lens is adapted to be switched to a first focal length or a second focal length; making the at least one light-emitting device to emit the visible light to irradiate a finger, and switching the focal length of the zoom lens to the first focal length so that the image capturing device captures a fingerprint image of the finger; making the at least one light-emitting device to emit the invisible light to irradiate the finger, and switching the focal length of the zoom lens to the second focal length so that the image capturing device captures a vein image of the finger; and verifying the fingerprint image, the vein image or a combination thereof, and determining true or false of the finger according to a verifying result of the fingerprint image, a verifying result of the vein image or a combination thereof.
 8. The identification method as claimed in claim 7, wherein if the finger is determined to be true, the identification method further comprises: determining an identification of a user having the finger according to the fingerprint image, the vein image or the combination thereof.
 9. The identification method as claimed in claim 7, wherein the finger is determined to be true when the fingerprint image is verified to be true and the vein image is verified to be true.
 10. The identification method as claimed in claim 7, wherein after the fingerprint image is captured and verified, the vein image is captured and verified.
 11. The identification method as claimed in claim 10, wherein true or false of the finger is determined according to the verifying result of the vein image other than according to the verifying result of the fingerprint image.
 12. The identification method as claimed in claim 7, wherein after the vein image is captured and verified, the fingerprint image is captured and verified.
 13. The identification method as claimed in claim 12, wherein true or false of the finger is determined according to the verifying result of the fingerprint image other than according to the verifying result of the vein image. 